August weather forecastGarrison, ND

August

Weather in August

The last month of the summer, August, is also a moderately hot month in Garrison, North Dakota, with an average temperature fluctuating between 81.1°F (27.3°C) and 58.6°F (14.8°C).

Temperature

Garrison experiences an average high-temperature of a still warm 81.1°F (27.3°C) in August, subtly different from July's 81.9°F (27.7°C). Garrison's average nighttime temperatures present a clear contrast to its daytime highs, measured at a refreshing 58.6°F (14.8°C) in August.

Heat index

The heat index value for August is estimated at 82.4°F (28°C). If one sustains activity during exposure, it could lead to a sense of fatigue, with a chance of heat cramps.
The heat index's values are generally associated with conditions in shade and light breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'real feel' or 'felt air temperature', quantifies the warmth felt when relative humidity is considered. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.

Humidity

With an average relative humidity of 54%, August is the least humid month.

Rainfall

In Garrison, North Dakota, in August, during 10.3 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. Throughout the year, in Garrison, there are 95.9 rainfall days, and 14.65" (372mm) of precipitation is accumulated.

Snowfall

In Garrison, North Dakota, snow does not fall in June through September.

Daylight

In August, the average length of the day is 14h and 13min.
On the first day of August in Garrison, sunrise is at 6:24 am and sunset at 9:19 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 8:27 pm CDT.

Sunshine

In August, the average sunshine is 10.8h.

UV index

The average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In August, the maximum UV index of 5 suggests this advice:
Take precautions - Protection against skin and eye damage is obliged. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.

Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

An average high-temperature, in August, in Garrison, is 81.1°F (27.3°C) and the average low-temperature is 58.6°F (14.8°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 82.4°F (28°C).

With an average relative humidity of 54%, August is the least humid month in Garrison.

The average relative humidity in August is 54%.

In Garrison, North Dakota, in August, during 10.3 rainfall days, 1.46" (37mm) of precipitation is typically accumulated.

June through September are months without snowfall in Garrison, North Dakota.

In August, the average day length in Garrison, North Dakota, is 14h and 13min.

In August, on the first day of the month, sunrise is at 6:24 am and sunset at 9:19 pm. On the last day of the month, in Garrison, sunrise is at 7:03 am and sunset at 8:27 pm CDT.

The average sunshine duration in August in Garrison is 10.8h.

The average daily maximum UV index in August in Garrison is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J August S O N D

Jul

August

Sep

Average high temperature

81.9°F

81.1°F

70.7°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

9.5mph

9.4mph

10.4mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

12.1

10.3

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

15.6

18.3

19.8

Average UV index

Average cloud cover

22%

26%

Average visibility

6mi

Average temperature in August
Garrison, ND

Average high temperature in August: 81.1°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (19.6°F).

Average low temperature in August: 58.6°F

The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).

Average pressure in August
Garrison, ND

Average pressure in August: 29.9"Hg

The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in August
Garrison, ND

Average wind speed in August: 8.6mph

The windiest month (with the highest average wind speed) is October (11mph).
The calmest month (with the lowest average wind speed) is August (8.6mph).

Average humidity in August
Garrison, ND

Average humidity in August: 54%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (54%).

Average rainfall in August
Garrison, ND

Average rainfall in August: 1.46"

The wettest month (with the highest rainfall) is June (2.64").
The driest month (with the least rainfall) is February (0.39").

Average rainfall days in August
Garrison, ND

Average rainfall days in August: 10.3 days

The month with the highest number of rainy days is June (13.9 days).
The month with the least rainy days is February (2.1 days).

Average snowfall in August
Garrison, ND

Average snowfall in August: 0"

The month with the highest snowfall is January (3.31").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Garrison, ND

Average snowfall days in August: 0 days

The month with the highest number of snowfall days is December (13 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Garrison, ND

Average daylight in August: 14h and 12min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

Average sunshine in August: 10h and 48min

The month with the most sunshine is July (Average sunshine: 11h and 18min).
The months with the least sunshine are January and December (Average sunshine: 3h and 42min).

Average sunshine days in August
Garrison, ND

Average sunshine days in August: 18.3 days

The month with the most sunshine days is September (19.8 days).
The month with the least sunshine days is March (13.9 days).

Average UV index in August
Garrison, ND

Average UV index in August: 5

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February and December (UV index 1).

Average cloud cover in August
Garrison, ND

Average cloud cover in August: 22

The month with the most cloud cover is February (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 22).

Average visibility in August
Garrison, ND

Average visibility in August: 6mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).